var xmlhttp = false;

//Check if we are using IE.
try {
//If the javascript version is greater than 5.
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
//If not, then use the older active x object.
try {
//If we are using IE.
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (E) {
//Else we must be using a non-IE browser.
xmlhttp = false;
}
}
//If we are using a non-IE browser, create a JavaScript instance of the object.
if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
xmlhttp = new XMLHttpRequest();
}
showcalendar = true; 

function calendar(objectid)
{
if (showcalendar == true)
{
var object = document.getElementById("openclose");
object.src="close_minus.jpg";
showcalendar = false;
var serverpage = "calendar.php";
var obj = document.getElementById(objectid);
xmlhttp.open("GET",serverpage);
xmlhttp.onreadystatechange = function() {
//alert(xmlhttp.responseText);

if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
{
obj.innerHTML = xmlhttp.responseText;
obj.style("z-index")=5;
}
}
xmlhttp.send(null);

}
else
{
var object = document.getElementById("openclose")
object.src="open_plus.gif";
showcalendar = true;
document.getElementById(objectid).innerHTML=""
}

}
